Laurino, John A. et al. published their research in Inorganic Chemistry in 1978 | CAS: 7528-78-1

3,3′,3”-Nitrilotripropanenitrile (cas: 7528-78-1) belongs to nitriles. Trimerization of aromatic nitriles requires harsh reaction conditions, high temperatures, long reaction times, and pressure. Nitriles are susceptible to hydrogenation over diverse metal catalysts. The reaction can afford either the primary amine (RCH2NH2) or the tertiary amine ((RCH2)3N), depending on conditions.Product Details of 7528-78-1

A convenient synthesis of 3,3′,3”-triaminotripropylamine tetrahydrochloride-0.5 water was written by Laurino, John A.;Knapp, Spencer;Schugar, Harvey J.. And the article was included in Inorganic Chemistry in 1978.Product Details of 7528-78-1 This article mentions the following:

3,3′,3”-Iminotrispropionitrile I was converted to the title compound (II). Hydrogenation of I over Raney Ni (wet with Ac2O) gave (AcNHCH2CH2CH2)3N which was hydrolyzed (aqueous HCl) to yield II. In the experiment, the researchers used many compounds, for example, 3,3′,3”-Nitrilotripropanenitrile (cas: 7528-78-1Product Details of 7528-78-1).

3,3′,3”-Nitrilotripropanenitrile (cas: 7528-78-1) belongs to nitriles. Trimerization of aromatic nitriles requires harsh reaction conditions, high temperatures, long reaction times, and pressure. Nitriles are susceptible to hydrogenation over diverse metal catalysts. The reaction can afford either the primary amine (RCH2NH2) or the tertiary amine ((RCH2)3N), depending on conditions.Product Details of 7528-78-1

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts